Blacklists Compared

23 July 2011

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]

Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the hostkarma.junkemailfilter.com (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
41756(total number of IP addresses tested, including 187 at SDSC)
38372(union of most IP zones)
29972l2.apews.org
29598b.barracudacentral.org
27583zen.spamhaus.org (union of all results)
25576cbl.abuseat.org
25574zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
24047hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
22105bl.mailspike.net (union of all results)
19617spam.dnsbl.sorbs.net
18978dnsbl-1.uceprotect.net
17686hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17654zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
16978bl.tiopan.com
16364dnsbl-2.uceprotect.net
15452dnsbl-3.uceprotect.net
15276blackholes.five-ten-sg.com (union of all results)
14156ddnsbl.internetdefensesystems.com
12590truncate.gbudb.net
12555bl.spameatingmonkey.net
11554dnsbl.sorbs.net (union of all results)
11482bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
10802psbl.surriel.com
10515bl.mailspike.net (result 127.0.0.11 = very bad reputation)
9019ubl.unsubscore.com
8792bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8554blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6175dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5636list.dnswl.org (not a blacklist!)
5139blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4807db.wpbl.info
4471no-more-funn.moensted.dk (union of all results)
4326bl.spamcop.net
4258wl.mailspike.net (union of all results) (not a blacklist!)
3961bl.score.senderscore.com
3669dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3430zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3342dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2979hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2900ix.dnsbl.manitu.net
2791hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2625no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2585hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2546wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2355dnsbl.inps.de
2259ips.backscatterer.org
2227bl.mailspike.net (result 127.0.0.12 = bad reputation)
1711no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1701wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1553blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1508hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1239korea.services.net
1110bl.spamcannibal.org
1095spamsources.fabel.dk
913mail-abuse.blacklist.jippg.org
899zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
899zen.spamhaus.org (union of SBL and SBLCSS results)
606accredit.habeas.com (not a blacklist!)
578query.bondedsender.org (not a blacklist!)
391l2.bbfh.ext.sorbs.net
369dnsbl.njabl.org (union of all results)
342aspews.ext.sorbs.net
268dnsbl.njabl.org (result 127.0.0.9 = open proxy)
246tr.countries.nerd.dk
232iadb2.isipp.com (not a blacklist!)
211iadb.isipp.com (not a blacklist!)
174dnsbl.ahbl.org (union of all results)
90dnsbl.ahbl.org (result 127.0.0.4 = spam source)
82no-more-funn.moensted.dk (result 127.0.0.9 = misc)
70dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
59hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
59no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
53dnsbl.njabl.org (result 127.0.0.2 = open relay)
48dnsbl.njabl.org (result 127.0.0.4 = spam source)
45dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
45dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
45dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
34l1.bbfh.ext.sorbs.net
33tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
33tor.dnsbl.sectoor.de (union of all results)
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
28no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
22swl.spamhaus.org (union of all results) (not a blacklist!)
14dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
13bl.deadbeef.com
11wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
7swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
7hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4spamguard.leadmon.net (union of all results)
3dnsbl-0.uceprotect.net
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2multi.uribl.com (union of all results)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
41756(total number of IP addresses whose names were tested, including 187 at SDSC)
23910hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20233hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15513(union of most domain zones)
12407abuse.rfc-ignorant.org
10159l1.apews.org
5534whois.rfc-ignorant.org (union of all results)
4618whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3233hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2988hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
920whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
519hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
471hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
423dbl.spamhaus.org (result 127.0.1.2 = spam source)
423dbl.spamhaus.org (union of all results)
201hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
181hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
150urired.spameatingmonkey.net
73hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
43postmaster.rfc-ignorant.org
36bogusmx.rfc-ignorant.org
25fresh.spameatingmonkey.net
20dob.sibl.support-intelligence.net
19rhsbl.ahbl.org
18multi.surbl.org
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6dsn.rfc-ignorant.org (zone not intended for this use)
5multi.uribl.com (result 127.0.0.2 = spam resource)
5multi.uribl.com (union of all results)
3bl.deadbeef.com
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
23736(total number of domains tested, including 160 at SDSC)
19993hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6552(union of most domain zones)
4007hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3665whois.rfc-ignorant.org (union of all results)
3537whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2131hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1993hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1384abuse.rfc-ignorant.org
797hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
738postmaster.rfc-ignorant.org
613l1.apews.org
596hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
550bogusmx.rfc-ignorant.org
526dbl.spamhaus.org (result 127.0.1.2 = spam source)
526dbl.spamhaus.org (union of all results)
432urired.spameatingmonkey.net
376multi.surbl.org
319multi.uribl.com (union of all results)
316hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
310multi.uribl.com (result 127.0.0.2 = spam resource)
243dsn.rfc-ignorant.org
128whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
110fresh.spameatingmonkey.net
102dob.sibl.support-intelligence.net
45hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9ex.dnsbl.org
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 July 2011.